Hbase入门笔记( 二 )-- Hadoop单机环境配置

迈不过友情╰ 2022-08-13 11:53 178阅读 0赞

关于Hbase的介绍，可以参见[http://wiki.apache.org/hadoop/Hbase][http_wiki.apache.org_hadoop_Hbase]与[http://en.wikipedia.org/wiki/HBase][http_en.wikipedia.org_wiki_HBase]。本文主要介绍在Ubuntu10.04环境下安装配置单机版原生的HBase。在网络上找到的文章要么语焉不详，要么ungeliable.于是记录一下自己的安装配置过程，做个STEP BY STEP的图文并茂的教程，谨防自己以后忘记 。

安装Hbase其实主要是配置好java环境以及Hadoop与Hbase的配置文件。

1.安装并配置Java环境。在Ubuntu10.04默认的源使用的OpenJDK，在某些应用上OpenJDK并不被支持(如abicloud等).我们为了省事还是安装sun java ，打开终端，输入以下命令：

(1)安装

查看是否安装成功

(2) 设置默认的java解释器。

会出现下列图面：

![2010112420312994.png][]

输入你想选择的编号。

(3)编辑java环境变量

在弹出的environment文件中添加下列两行：  
  CLASSPATH=.:/usr/lib/jvm/java-6-sun/lib  JAVA\_HOME=/usr/lib/jvm/java-6-sun

保存退出，行文至此，java环境已经配置好。

2.安装并配置Hadoop。虽说我安装的是单机版的Hbase，但是由于Hadoop本来就是分布系统，使用SSH通讯。

(1)安装ssh

(2)设置不用登录密码

$ ssh-keygen -t rsa -f ~/.ssh/id_rsa -P ""

$ cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys

完成后登录不用输入密码，第一次需要输入回车键。

(3)下载解压Hadoop，到[http://hadoop.apache.org/common/releases.html\#Download][http_hadoop.apache.org_common_releases.html_Download]下载stable版本0.20.2.并解压到/Home路径

(4)修改hadoop-env.sh 。在本人机器上解压路径是/home/viki/hadoop-0.20.2，进入刚才所解压的文件夹，修改之(需要root权限)。

将以下java环境copy进去。

(5)设置xml文件，需要设置conf文件夹下的三个文件core-site.xml, hdfs-site.xml, mapred-site.xml。

将下面内容copy进该文件中：

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     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

保存退出，继续修改另外一个文件hdfs-site.xml

将下面内容copy进该文件

保存退出，修改最后一个文件

将下面内容copy进该文件

经历以上步骤，所有文件修改完毕，已经设置好Hadoop单机测试环境，下面将是启动Hadoop服务。

3.格式化Namenode并开启所有Hadoop服务，查看服务状态。

(1)格式化Namenode

会出现下面画面：

(2)启动所有Hadoop服务

会出现下面画面：

![2010112421594036.png][]

(3)查看服务状态。

管理页面：[http://localhost:50030/jobtracker.jsp][http_localhost_50030_jobtracker.jsp]

[http_wiki.apache.org_hadoop_Hbase]: http://wiki.apache.org/hadoop/Hbase
[http_en.wikipedia.org_wiki_HBase]: http://en.wikipedia.org/wiki/HBase
[2010112420312994.png]: /images/20220810/961e562df7fe4521b4251344e55d799b.png
[http_hadoop.apache.org_common_releases.html_Download]: http://hadoop.apache.org/common/releases.html#Download
[2010112421594036.png]: /images/20220810/38fe6d4b9f9b4c6faf59a40c277bfc75.png
[http_localhost_50030_jobtracker.jsp]: http://localhost:50030/jobtracker.jsp